The benchmark I have showed that should run in any browser ( at least those A grade ) is here. During this talk I have tried to explain what each test means. You can grab the benchMark function from the source, it's simple but it ruffling did the job.

Talk Summary

I have tried to explain that sometimes we should take care of performances techniques, accordingly with the goal and the target.I have showed how things could go slow in whatever Netbook, regardless hardware acceleration.What I have not been probably able to explain , is that it's up to our common sense decide when we should avoid common good practices or not, and I won't link here the IE9+iPhone/iPad canvas experiment since I would like to talk with openstreetmap.org guys before and eventually create a proper GitHub project for their slickviewer, mobile version.